%PDF-
%PDF-
Mini Shell
Mini Shell
/* Generated by re2c */
// re2rust $INPUT -o $OUTPUT
#[derive(Debug, PartialEq)]
enum Num { Int, Float, NaN }
fn lex(str: &[u8]) -> Num {
let mut cur = 0;
let mut mar = 0;
{
#[allow(unused_assignments)]
let mut yych : u8 = 0;
let mut yyaccept : usize = 0;
let mut yystate : usize = 0;
'yyl: loop {
match yystate {
0 => {
yych = unsafe {*str.get_unchecked(cur)};
cur += 1;
match yych {
0x2E => {
yystate = 3;
continue 'yyl;
}
0x30 => {
yystate = 4;
continue 'yyl;
}
0x31 ..= 0x39 => {
yystate = 5;
continue 'yyl;
}
_ => {
yystate = 1;
continue 'yyl;
}
}
}
1 => {
yystate = 2;
continue 'yyl;
}
2 => { return Num::NaN; }
3 => {
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x30 ..= 0x39 => {
cur += 1;
yystate = 7;
continue 'yyl;
}
_ => {
yystate = 2;
continue 'yyl;
}
}
}
4 => {
yyaccept = 0;
mar = cur;
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x2E => {
cur += 1;
yystate = 7;
continue 'yyl;
}
0x30 ..= 0x39 => {
cur += 1;
yystate = 9;
continue 'yyl;
}
0x45 |
0x65 => {
cur += 1;
yystate = 11;
continue 'yyl;
}
_ => {
yystate = 2;
continue 'yyl;
}
}
}
5 => {
yyaccept = 1;
mar = cur;
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x2E => {
cur += 1;
yystate = 7;
continue 'yyl;
}
0x30 ..= 0x39 => {
cur += 1;
yystate = 5;
continue 'yyl;
}
0x45 |
0x65 => {
cur += 1;
yystate = 11;
continue 'yyl;
}
_ => {
yystate = 6;
continue 'yyl;
}
}
}
6 => { return Num::Int; }
7 => {
yyaccept = 2;
mar = cur;
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x30 ..= 0x39 => {
cur += 1;
yystate = 7;
continue 'yyl;
}
0x45 |
0x65 => {
cur += 1;
yystate = 11;
continue 'yyl;
}
_ => {
yystate = 8;
continue 'yyl;
}
}
}
8 => { return Num::Float; }
9 => {
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x2E => {
cur += 1;
yystate = 7;
continue 'yyl;
}
0x30 ..= 0x39 => {
cur += 1;
yystate = 9;
continue 'yyl;
}
0x45 |
0x65 => {
cur += 1;
yystate = 11;
continue 'yyl;
}
_ => {
yystate = 10;
continue 'yyl;
}
}
}
10 => {
cur = mar;
match yyaccept {
0 => {
yystate = 2;
continue 'yyl;
}
1 => {
yystate = 6;
continue 'yyl;
}
_ => {
yystate = 8;
continue 'yyl;
}
}
}
11 => {
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x2B |
0x2D => {
cur += 1;
yystate = 12;
continue 'yyl;
}
0x30 ..= 0x39 => {
cur += 1;
yystate = 13;
continue 'yyl;
}
_ => {
yystate = 10;
continue 'yyl;
}
}
}
12 => {
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x30 ..= 0x39 => {
cur += 1;
yystate = 13;
continue 'yyl;
}
_ => {
yystate = 10;
continue 'yyl;
}
}
}
13 => {
yych = unsafe {*str.get_unchecked(cur)};
match yych {
0x30 ..= 0x39 => {
cur += 1;
yystate = 13;
continue 'yyl;
}
_ => {
yystate = 8;
continue 'yyl;
}
}
}
_ => {
panic!("internal lexer error")
}
}
}
}
}
fn main() {
assert_eq!(lex(b"123\0"), Num::Int);
assert_eq!(lex(b"123.4567\0"), Num::Float);
}
Zerion Mini Shell 1.0